By way of comparison, I remember getting in an argument with somebody about the guys in SW being able to block laser beams with a light saber, saying it doesn't matter how force-ful his parrying is, he doesn't move at lightspeed.
Ah, but he doesn't need to. All a Jedi has to do is *put his lightsaber in front of where the beam would be*. That doesn't require moving at lightspeed. The beam is going to get from whoever's firing, to the Jedi, regardless. All that matters is having something *blocking* said Jedi from being hit.